I like using rentometer and craigslist to gauge averages in a specific area - craigslist is a good resource as people generally include photos so you can see what kind of quality the unit is. I also check the MLS for additional comps if needed.
Jeffrey Goers I have a question for you.. What's the market like in Baltimore?! Are there many multifamily opportunities or is "flips"'still the way the way to go?!
@David Alvarado thanks for the info. @Richard Miller there is a ton of investor rehabs going on in Baltimore to both flip and hold to rent, and has been for the last several years. You can take either path successfully in Baltimore.